1 | <?php |
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2 | $seiten_id = 'sonstiges'; |
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3 | $version = '$Id: miscellaneous.php 287 2012-08-16 09:02:07Z heribert $'; |
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4 | $title = 'Miscellaneous'; |
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5 | |
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6 | require "../lib/technikum29.php"; |
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7 | ?> |
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8 | <h2>Miscellaneous</h2> |
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9 | |
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10 | <h3>Pianola</h3> |
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11 | <p>The technikum29 is quite versatile – beside all the communication |
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12 | and computer technology we also show very special exhibits: This is |
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13 | a fully executable pianola, year of manufacture about 1910-1915.</p> |
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14 | |
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15 | <p> |
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16 | It's a great experience see and hear such old jukeboxes, typically made |
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17 | only of natural materials like leather, gum, wood, bone glue, felt, metal, paper, |
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18 | ivory and glas. |
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19 | <br/>By assembling these elements on an intelligent way, one could |
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20 | build a simple mechanical machine which is especially impressive |
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21 | for today's people. Here at the technikum29, we will show you how |
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22 | this device works, we will explain the basic functionality and |
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23 | play challenging compositions. While having covers removed, you can |
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24 | even see the fascinating mechanics working. |
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25 | </p> |
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26 | |
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27 | <div class="box center"> |
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28 | <img src="/shared/photos/kommunikationstechnik/pianola.jpg" |
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29 | alt="Picture of the Pianola" width="700" height="618" class="nomargin-bottom" /> |
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30 | </div> |
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31 | |
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32 | <h3 id="leander">Art in the Museum</h3> |
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33 | |
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34 | <p>The technikum29 motivates activities that get awards and prices. The latest |
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35 | example is that of the young artist Leander A. Schwarzer who transforms |
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36 | everyday things into pieces of art. He has developed pictures made from zippers |
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37 | that can be opened thus giving the viewer the opportunity to modify the picture |
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38 | itself.<br> |
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39 | His latest visit to the technikum29 has inspired him to make art from |
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40 | and with punch cards which were the basis of industrialization in the 20th |
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41 | century. First the "Terzett" (Trio) was created which consists of three punched |
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42 | cards with these irreversible sentences:</p> |
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43 | |
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44 | <div class="box left"> |
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45 | <img src="/shared/photos/start/lk.jpg" width="250" height="350" class="nomargin-bottom" /> |
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46 | <p class="Bildtext small">Picture 1: 3 punch cards with text</p></div> |
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47 | |
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48 | ANOTHER WORLD IS POSSIBLE<br> |
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49 | IMPOSSIBLE IS NOTHING<br> |
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50 | IMAGINE ALL THE PEOPLE<br> |
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51 | <div class="box right"> |
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52 | <img src="/shared/photos/start/leander.jpg" alt="Leander Schwarzer" width="313" height="239" class="nomargin-bottom" /> |
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53 | <p class="Bildtext small">Picture 2: Leander A. Schwarzer punching cards on an IBM key punch</p> |
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54 | |
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55 | </div> |
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56 | |
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57 | <p>These cards were hanged on a wall at a distance of 1-2 cm. During the day sun |
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58 | rays create shadows of the punched and coded text on the wall behind the cards. |
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59 | This work of art was awarded a price at the 32th grafics competition in Austria |
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60 | (Innsbruck, 2011). This in turn motivated Mr. Schwarzer to continue his work |
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61 | with punched cards. He spent several days at the technikum29 punching excerpts |
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62 | from Marx' "Capital" thereby creating a pile of several hundred cards. These |
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63 | were shown in the exhibition "A Symbol of Freedom" in Piacenza (Italy). Punched |
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64 | cards transform contemporary slogans into visual paradoxes when they create |
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65 | their unique shadows.</p> |
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66 | <div class="box left"> |
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67 | <img src="/shared/photos/start/lk-musik.jpg" alt="Musik aus Lochkarten" width="336" height="188" class="nomargin-bottom" /> |
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68 | <p class="Bildtext small">Picture 3: Punched cards running through a "musical clock"</p> |
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69 | </div> |
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70 | |
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71 | <p>Another work, "Fetish Character of commodities", concatenates the cards |
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72 | containing Marx' text fragments. This string of cards is then pulled through a |
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73 | mechanism like a musical clock that generates sounds controlled by the holes in |
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74 | the cards. So, finally, the "Capital" is transformed into atmospheric sounds.</p><br> |
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75 | |
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76 | |
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77 | |
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78 | |
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79 | <h3>Movie projector "Dresden 1"</h3> |
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80 | |
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81 | <div class="box left clear-after"> |
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82 | <img src="/shared/photos/kommunikationstechnik/kinomaschine.dresden1.jpg" |
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83 | alt="Photography of the movie projector Dresden 1" width="350" height="630" /> |
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84 | |
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85 | <div class="bildtext"> |
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86 | <p>The technikum29 has a movie projector from 1951 (there are |
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87 | more and even older projectors from the 1930s that are stored in the |
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88 | archive for lack of space).</p> |
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89 | <p> |
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90 | Movie projectors have always been very complex devices. At that time, |
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91 | the bright picture projection was archived with an arc light which was |
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92 | generated between two carbon pencils. The waste heat was deflected via a |
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93 | chimney pipe! <!-- stupid mode... --> |
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94 | Since the pencils got shorter and shorter while the movie went on, they |
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95 | had to be moved continously closer together for producing a constant |
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96 | luminosity. Otherwise the light goes out. |
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97 | <br/>We will repair this device to show an original newsreel from the 1960s. |
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98 | </p> |
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99 | </div> |
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100 | </div> |
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101 | |
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102 | <h3 id="demo">Siemens Demonstration Computer</h3> |
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103 | <div class="box center"> |
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104 | <img src="/shared/photos/rechnertechnik/siemens-democomputer.jpg" alt="Siemens demonstration educational computer CPU" width="700" height="587" /> |
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105 | <p class="center"><b>Siemens educational computer</b></p> |
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106 | </div> |
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107 | |
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108 | <p>This demonstration model was build in 1973, when personal computers were not |
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109 | invented for a long time yet. Engineers had to be trained to understand |
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110 | computer architectures. Therefore, this big education model was constructed. |
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111 | It is a giant implementation of a typical register machine where 126 lamps |
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112 | display all registers, control, ALU and RAM, including the data flow. |
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113 | Featuring a mutable clock pulse and only 4 bit word with, elementary opcodes |
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114 | could be reproduced in a very illustrative way. The device can be toggled to |
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115 | process one instruction or one cycle a time. |
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116 | <br>On the left side, the computer program could be directly "written" by plugging |
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117 | cartidges labeled with assembly instruction mnemonics or numerical values |
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118 | (immediate operands). On this cartiges the user could directly read the binary |
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119 | value of the machine instruction which will be the content of the corresponding |
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120 | random access field. As you might guess, the computer cannot change the program |
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121 | memory without user interaction, so this model actually implements an Harvard |
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122 | architecture, even though the (german) labels on the frontend suggest something |
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123 | different. |
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124 | <br>The picture above shows a currently running program that adds memory cells. It |
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125 | shows that computer word lengths do not limit the length of proccessable |
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126 | numbers. |
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127 | <br>It is a wonderful device that can even be used today to understand the elementary |
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128 | workflow of modern high end desktop CPUs. |
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129 | </p> |
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